
class Calculator:
    @staticmethod
    def add(a,b):
        return a+b
    
    @staticmethod
    def sub(a,b):
        return a-b
    
a = 10
b = 5
print(f"{a}+{b}={Calculator.add(a,b)}")

print(f"{a}-{b}={Calculator.sub(a,b)}")
